Thirds to caeeold lafayette etheeidge and thomas  harden



(No Model.)

W. J. KING.

HOLLOW GRATE AND FEED WATER HEATER.

Patented Mar. 20

N FETERS, Pnowmnngmuher. wmmgwu. nu;

UNITED STATES PATENT OFFICE.

VILLIAM JESSEE KING, OF BUCHANAN, TENNESSEE, ASSIGNOR OF TVO- THIRDS TO OARROLD LAFAYETTE ETHERIDGE AND THOMAS `HARDEN VHITLOOK, BOTH OF SAME PLACE.

HOLLOW @RATE AND FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 379,790, dated March 20, 1888.

Application lilcd lleecmberQS, ISS?. Serial No. 258,783. (No model.)

To aZZ whom, it may concern.-

Beit known that I, WILLIAM JEssEE KING, a citizen of the United States, residing at Buchanan, in the county of Henry and State of Tennessee, have invented new and useful Improvements in a Hollow Grate and Feed-Tater ,Heateig of which the following is a specification.

This invention has relation to combined wa- 1C ter-grates and feed-water heaters; and it has for its objects to provide such a grate in which the water may either pass through the hollow Ygrate-bars or pipes from the pump, inspirator, or other means for forcing the feed-water into I5 the boiler, or may circulate from the boiler through the hollow grate-liars or pipes back into the boiler, and to provide means whereby the central bars or pipes of the grate may be kept filled with water in spite of the greater 2o heat and consequent greater generation of steam in these bars or pipes than in the side bars or pipes, and to provide a strong support for t-he tubular grate bars or pipes, as will hereinafter be more fully set forth, and pointed out in the claims. v

In the drawings, Figure 1 is a longitudinal Vertical sectional view of so much of a steamboiler as illustrates Iny invention. Fig. 2 is a transverse vertical sectional view tak en on line 3o :c x, Fig. 1; and Fig. 3, is a horizontal sectional View taken on lines y y, Figs. 1 and 2, giving a diagram of the entire system of grate bars or pipes and of the various pipes and cocks connected to them.

The boiler is indicated by the numeral 1 and the furnace by the numeral 2, and these parts, as well as the jacket 3, may be of any suit-able construction.

Under the furnace are secured transversely 4o a number of grate-supporting bars, 4, upon which the pipes 5 or tubular grate-bars are supported, the said pipes or tubular gratebars being preferably arranged in the same manner as the pipes of a steam-radiator, consisting of the straight pipes and the elbows or joints 6, which unite the ends of the same.

One of the side bars or pipes is extended out th rough the jacket of the furnace, as shown at 7, and is provided with a stop-cock, 8, and

5o a pump or inspirator, 9, is connected to this pipe with its discharge-pipe, upon which is a stop-cock, 10, the end of another pipe, 1l, which is likewise provided with a stop-cock, 12, being connected to the discharge of the pump or i nspiratorand extending to the boiler, which it enters.

Two pipes, 13, extend through the front oi' the furnace and jacket to the boiler, having stop-cocks 14 upon them, and the other side bar or pipe is provided with an extension, 15, which has a T-joint secured to its end, which is provided with stop-cocks 16 at each side of the pipe extension, one of the stop-cocks at the open branch of the pipe serving as a blowoff cock, while the other cock serves to close a pipe, 17, extending to the boiler.

\Vhen the boiler is to be fed with cold water, the stop-cock 8 upon the side pipe is closed and the pump or inspirator is operated, the cock upon the discharge-pipe and the cock 7o 12 upon the pipeleading into the boiler being opened, and cold water may thus be fed into the boiler.

Vhen the fire in the furnace is burning and the boiler-grate is to be fed, the cock 12 upon 75 the pipe leading into the boiler is closed and the discharge-pipe and the extension of the side pipe are opened,so that the water pumped into the pipe extension may pass through the same and through the entire grate formed by 8o the pipes,thestop-cocks 14 upon the extensions 13, extending from the central coils of the grate, being closed,so that the water will pass th rough the grate and into the boiler by the pipe at the other side pipe, the blow-off cock being closed and the cock of the boiler-pipe being opened.

It will be seen that by having the feed-Water thus circulating through the tubular grate bars or pipes it will serve to keep the said bars or pipes cool, and at the same time be 9o sufficiently heated to generate steam when it enters the boiler, the grate thus effecting a saving in fuel by heating the feed-water on its passage to the boiler without consuming any more fuelthan would be used for heating the V water in the boiler if it was forced into the boiler heated from an outside source to the same degree as the water coming from the grate.

When the boiler has been sufficiently sup- :oo

Y the same time being heated.

The central coils are provided with the pipes to the boiler for the purpose of keeping them filled with Water, as the intense heat at the center of the furnace would otherwise convert the water in the-central pipes to steam, and consequently injure the pipes if the side pipes were only relied upon to supply and carry off the Water to and from the grate.

As the grate will by its construction receive water at the center, Where the heat is most intense, and deliver the Water to the boiler either at one or both sides, the pipes of the grate will at all times be full and will thus prevent the fire from injuring them as rapidly as it would if the Water was allowed to pass through Vthe entire grate from one side to the other, as insuch a case the Water would be converted into steam and would not be able to preserve the pipes from burning.

By having the supporti ngba'rs secured transversely under the grate-pipes, the grate is enabled to bear the Weight of the fuel upon it, and at the same timethe pipes resting loosely upon the transverse bars may expand and contract as they are heated or cooled off without any hinderance, so that they will at all times retain their relative positions Without doubling or bending or straining their connection with the boiler.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United Statesl. The grate-pipes 5, supported freely upon vthe fixed cross-bars 4 within the furnace2, the

end branches of said pipes connecting with the boiler outside of the furnace by the pipes 11 and 17, and the middle grate-pipes connecting with the boiler outside of the furnace by the pipes 13, whereby the expansion and contraction of the grate-pipes are relieved from undue strain at their connection With the boiler, as herein set forth.

2. In a boiler-furnace, a Water-grate and feed-Water heater consisting of a flatv grate of parallel pipes connected at their ends by snitable joints and having au inlet at one end and an outlet at the other end and provided with inlets at the middle coils, as shown and set forth.

3. In a boiler-furnace, the combination of other end ofthe pipe-coil to the boiler, provided with a stop-cock and with a blowoff'cock, as shown and described.

WILLIAM JESSEE KING.

Witnesses:

C. V. BURTON, R. B. FIELDS. 

